@article {Ash164, author = {Lorraine Ash and Bohdan Bybel and Donald Neumann and Wendy Beebe}, title = {The Helmet Sign: Physiologic Radioactive Accumulation After 131I Therapy{\textemdash}A Case Report }, volume = {32}, number = {3}, pages = {164--165}, year = {2004}, publisher = {Society of Nuclear Medicine}, abstract = {After 131I radioablative treatment, a 51-y-old woman underwent whole-body 131I scanning, which revealed intense uptake along the periphery of the skull. The patient disclosed that she had not washed her hair because she had obtained a new hairstyle between the 131I treatment and the scan. The intense uptake along the periphery of the skull represented radioactive physiologic accumulation at the patient{\textquoteright}s scalp.}, issn = {0091-4916}, URL = {https://tech.snmjournals.org/content/32/3/164}, eprint = {https://tech.snmjournals.org/content/32/3/164.full.pdf}, journal = {Journal of Nuclear Medicine Technology} }